WO2020084058A1 - Analyse d'état d'un matériel électrique - Google Patents

Analyse d'état d'un matériel électrique Download PDF

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Publication number
WO2020084058A1
WO2020084058A1 PCT/EP2019/079037 EP2019079037W WO2020084058A1 WO 2020084058 A1 WO2020084058 A1 WO 2020084058A1 EP 2019079037 W EP2019079037 W EP 2019079037W WO 2020084058 A1 WO2020084058 A1 WO 2020084058A1
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WO
WIPO (PCT)
Prior art keywords
partial discharge
equipment
signal
transmission parameters
measurement signal
Prior art date
Application number
PCT/EP2019/079037
Other languages
German (de)
English (en)
Inventor
Erik Winkelmann
Original Assignee
Maschinenfabrik Reinhausen Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Reinhausen Gmbh filed Critical Maschinenfabrik Reinhausen Gmbh
Priority to KR1020217016062A priority Critical patent/KR20210081414A/ko
Priority to CN201980068768.3A priority patent/CN112912741A/zh
Priority to JP2021522393A priority patent/JP2022505739A/ja
Priority to EP19797202.9A priority patent/EP3870983B1/fr
Priority to US17/287,118 priority patent/US20210356507A1/en
Priority to CA3112370A priority patent/CA3112370A1/fr
Priority to BR112021006275A priority patent/BR112021006275A2/pt
Publication of WO2020084058A1 publication Critical patent/WO2020084058A1/fr
Priority to ZA2021/01650A priority patent/ZA202101650B/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits

Definitions

  • the invention relates to a method for analyzing the condition of electrical equipment and a test device for analyzing the condition of electrical equipment.
  • Partial discharge refers to a localized electrical discharge that only partially bridges insulation between conductors and that can, but does not have to, occur adjacent to a conductor. Partial discharges can be due to sources of error, for example defects or inhomogeneities in the electrical insulation. Partial discharges contribute to the aging of the electrical insulation and therefore have a disadvantageous effect on its dielectric quality, in particular dielectric strength. In order to ensure the dielectric quality of electrical equipment, partial discharge measurements are carried out to check the presence of partial discharges and, if necessary, to determine their specific properties.
  • a signal that is generated by a PD in response to a test voltage must pass through a certain transmission path between the location of the PD and the measurement location.
  • the original TE pulse is damped and deformed.
  • the apparent charge only a fraction of the discharge energy converted at the defect can be measured at the measuring point.
  • TE values are generally defined, which must not be exceeded. This definition refers to the apparent charge measurable at the measuring point, which in turn is only a fraction of the actual discharge energy. Quality assurance of the equipment is therefore only possible to a limited extent.
  • the time domain reflectometry method can be used.
  • the time offset between the test pulse fed in and the measured reflection corresponds to twice the way to the fault location. In terms of measurement technology, this is made considerably more difficult by signal attenuation and dispersion, since the location is only possible with a sufficient signal amplitude using this method.
  • the method requires a reflection at the fault location, which is not always the case due to the wave impedance at the fault location.
  • the improved concept is based on the idea of identifying the influence of the transmission path on the signal from a measurement signal, which is recorded in particular in response to an applied test voltage. This influence is described by transmission parameters which are characteristic of the partial discharge or the source of the error or sources of error. Therefore, the transmission parameters allow conclusions to be drawn about parameters of the partial discharge.
  • a method for analyzing the condition of electrical equipment is specified.
  • a test voltage is applied to the operating medium, for example impressed into the operating medium, in particular at an embossing point of the operating medium.
  • a measurement signal is then recorded at a connection point of the equipment.
  • transmission parameters are determined which characterize a signal transmission from a location of a partial discharge in the equipment to the connection point.
  • at least one parameter of the partial discharge is determined.
  • the measurement signal can be understood as a response to the test voltage due to the partial discharge.
  • several partial discharges for example at different locations on the equipment, can jointly lead to the measurement signal.
  • place of partial discharge This is encompassed by the wording “place of partial discharge” and may be understood as “places of partial discharge” or accordingly.
  • the determination of the transmission parameters includes discretization and / or digitization of the measurement signal, as a result of which a discrete measurement signal is generated.
  • the transfer parameters represent parameters of a transfer function or transfer function which characterize the signal transfer from the location of a partial discharge to the connection point.
  • the measurement signal or the discrete measurement signal can represent an input signal on site the partial discharge, or in the case of several partial discharges at an apparent partial discharge location, are understood, the transfer function functioning as a mapping operator.
  • the transfer function can always also represent an approximation of an exact transfer function.
  • the test voltage is, in particular, an alternating voltage, for example with a frequency in the range 0-500 Hz. However, in different embodiments, direct voltage can alternatively be used as the test voltage.
  • the test voltage is provided in particular by a high-voltage source, which is connected directly or indirectly, in particular via at least one blocking impedance and / or via an input filter, to the embossing point.
  • the blocking impedance and / or the input filter can serve to decouple the high voltage source from the rest of the test setup.
  • the transmission parameters are determined by means of a method for linear predictive coding (LPC), or parts of a method for LPC.
  • LPC methods are currently used in audio signal and speech processing Signal value at a specific point in time from a linear combination of signal values at previous discrete points in time be determined and thus predicted to a certain extent.
  • the determination of the transmission parameters includes the determination of filter coefficients of a virtual filter, the filter approximately emulating the signal transmission.
  • the filter is referred to here as virtual, since it does not have a physical equivalent in the sense of a dedicated filter component, but is effectively formed by the equipment, the measuring circuit and, if applicable, the source of the error or sources of error.
  • the filter according to LPC is described by a recursion equation, for example as follows
  • k is a discrete time variable, i.e. a natural number greater than zero
  • y (k) is the value of the discrete measurement signal at the discrete point in time k
  • N is an order of approximation.
  • y (ki) 0 is defined if (ki) is less than or equal to zero.
  • the a k are the so-called linear predictors of the Nth order and e (k) is a prediction error.
  • the predictors a k represent the transmission parameters. Since the values of the discrete measurement signal are known, the transmission parameters can be determined by minimizing the total quadratic error.
  • the total quadratic error is given by qE according to the equation
  • the total quadratic error of a can be differentiated, the respective result can be equated with zero and the resulting system of equations can be solved from N linear equations.
  • the operating medium is constructed homogeneously, in particular special resistance elements, inductive and / or capacitive elements of the operating medium are distributed homogeneously.
  • the homogeneously constructed equipment can be, for example, a cable, in particular a shielded cable, for example a shielded high-voltage cable, a GIS or a GIL.
  • the operating means is constructed inhomogeneously, in particular special resistance elements, inductive and / or capacitive elements of the operating means are distributed inhomogeneously.
  • the inhomogeneous equipment can be, for example, a power transformer, a tap changer or another component of a power transformer.
  • the inhomogeneously constructed equipment can also be a circuit breaker, a disconnector, a disconnector for use in GIS or air-insulated switchgear, a transducer, a surge arrester.
  • the at least one parameter includes one or more sources of error from which the partial discharge results. This can be advantageous both for homogeneously constructed and for inhomogeneously constructed equipment.
  • such an embodiment can be of advantage in DC applications or applications for continuous monitoring or monitoring of the equipment.
  • the at least one parameter of the one or more error sources includes a number of the error sources or a relative contribution of one of the error sources to the partial discharge, in particular to an overall charge value of the partial charge.
  • the at least one parameter of the error sources is used to identify an error image.
  • identification is not possible.
  • the improved concept therefore allows an evaluation of the partial discharge. Depending on the evaluation, a decision can be made, for example, as to whether an action such as maintenance, repair, decommissioning or replacement of the equipment or a part thereof is required. In particular, unnecessary actions can be avoided.
  • the error image can be seen as a "fingerprint" of the error sources.
  • the fault pattern is assigned to a known characteristic fault pattern.
  • the known characteristic error pattern can, for example, be taken from an error catalog or generated by machine learning.
  • the method also includes generating a response signal as a function of a theoretical input signal, which is particularly time-discrete, and the transmission parameters.
  • the response signal corresponds to a theoretical measurement signal if the theoretical input signal were present at the location of the partial discharge.
  • the theoretical input signal is a pulse signal that approximates a partial discharge pulse.
  • the theoretical input signal can only differ from zero at a discrete point in time. This corresponds to the usually very short rise time of a partial discharge pulse.
  • generating the response signal includes determining a transfer function from the transfer parameters and applying the transfer function to the theoretical input signal.
  • the transfer function can be applied to the theoretical input signal in a z-space. That is, a z-transformation of the theoretical input signal can be generated and with the transfer function can be multiplied in the corresponding z-space representation, optionally the result can be transformed back into the discrete time period by an inverse z-transformation in order to get the response signal in the discreet period. Alternatively, the calculation can take place in a discrete period or in the frequency range.
  • the at least one parameter of the partial discharge includes a value for an apparent charge of the partial discharge.
  • the apparent charge is an apparent charge at the location of the partial discharge.
  • the value for an apparent charge of the partial discharge is determined as a function of the response signal.
  • the determination of the value for the apparent charge includes an integration of the response signal or a signal dependent on the response signal, in particular in the discrete time period.
  • the signal dependent on the response signal can be generated, for example, by filtering the response signal.
  • the filtering can correspond to a bandpass filtering, in particular with a frequency band according to the international standard IEC 60270: 2000, the content of which is hereby incorporated by reference.
  • the frequency band can lie, for example, within the range 100-900 kHz or correspond, for example, 100-400 kHz.
  • the response signal is not subject to significant noise or other interferences, a reliable value for the apparent charge at the location of the PD can be determined despite the signal attenuation. According to the improved concept, the apparent charge can thus be determined with increased accuracy and regardless of the distance from the junction to the location of the partial discharge.
  • the charge value determined in this way can be related to the theoretical input signal. From this it can be determined which portion of the input signal can still be measured as an output signal. This enables the energy converted at the discharge location to be determined regardless of the distance from the measuring point to the fault location. This is of considerable advantage for the assessment of the condition of electrical equipment, since it can be used to assess the risk posed by the fault.
  • the value for the apparent charge at the location of the TE can be determined according to the improved concept for both homogeneous and inhomogeneous equipment.
  • the at least one parameter of the partial discharge includes a fault location of the partial discharge.
  • the fault location of the partial discharge is determined as a function of the response signal.
  • determining the fault location of the partial discharge includes adapting a reference function to the response signal, the adaptation being carried out by adapting at least one parameter of the reference function.
  • the adaptation is carried out using a numerical optimization algorithm, for example a Levenberg-Marquardt algorithm.
  • the reference function is a solution to a differential equation for describing an electrical resonant circuit.
  • the reason for this is that the partial discharge stimulates an electrical resonant circuit between the fault location of the partial discharge and the connection point.
  • the location of the fault is determined as a function of a capacitance and / or an inductance of the equipment, the capacitance and / or the inductance in particular representing a respective approximate value.
  • the capacitance and / or the inductance are determined by adapting the reference function to the response signal.
  • the capacitance and / or the inductance are parameters of the reference function which are adapted.
  • the location of the partial discharge is determined from the at least one adjusted parameter of the reference function and a geometry of the equipment.
  • the location of the partial discharge can be determined according to the improved concept, especially for homogeneous equipment. Because the response signal is not subject to significant noise or other interferences, the source of the error can be located very precisely despite the signal attenuation, regardless of the distance from the connection point to the error location. Tests indicate an accuracy of at least 5% based on the length of the equipment.
  • the parameters of the reference function can be determined, in particular the capacitance and / or the inductance, which means that a qualitative assessment can be made even without a detailed inclusion of the geometry of the equipment, for example, a relative position of different sources of error to one another and related to the Junction can be determined.
  • a test device for analyzing the condition of a electrical equipment specified.
  • the test device has an evaluation device, which is set up to detect a measurement signal at a connection point of the equipment. Depending on the measurement signal, the evaluation unit is also set up to determine transmission parameters which characterize a signal transmission from a location of a partial discharge in the equipment to the connection point. In addition, the evaluation unit is set up to determine at least one parameter of the partial discharge as a function of the transmission parameters.
  • this also contains a high-voltage source for applying a test voltage to the equipment.
  • the test device includes a coupling unit which can be coupled to the connection point and with the evaluation unit, in particular can be electrically connected directly or indirectly, and is set up to provide the measurement signal to the evaluation unit.
  • the coupling unit contains a measurement impedance, in particular an inductive element with adjustable inductance.
  • the coupling unit contains a filter element or filter network connected downstream of the inductive element.
  • the filter element has, for example, high-pass or band-pass characteristics.
  • Possible cut-off frequencies for the high pass can be, for example, 30 kHz or 100 kHz.
  • the bandpass for example, 100 kHz as the lower limit frequency and / or 400 kHz or 500 kHz as the upper limit frequency are possible.
  • Other cut-off frequencies are possible or necessary depending on the specific requirements. For example, monitoring applications may require bandpass characteristics that require an upper cut-off frequency of several MHz up to several 10 MHz.
  • the coupling unit is set up to convert a signal, in particular a current signal, at its input into the measurement signal, in particular a voltage signal, at its signal output.
  • the test device includes a coupling capacitor which can be switched between the coupling unit and the connection point, in particular can be connected directly or indirectly to the connection point and can be connected or connected electrically directly or indirectly to the coupling unit.
  • the coupling capacitor is, for example, a high-voltage capacitor.
  • the coupling capacitor can, for example, reload a source of error or maintain an electrical field at the fault.
  • test device result directly from the various configurations of the method according to the improved concept and vice versa.
  • one or more of the components and / or arrangements described for the test device for implementing the method can be implemented accordingly.
  • Figure 1 is a schematic representation of an exemplary embodiment of a test device according to the improved concept and an exemplary equipment
  • Figures 2a, 2b representations of an exemplary transfer function according to an exemplary embodiment of a method according to the improved concept
  • Figures 3a, 3b, 3c representations of a measurement signal, a theoretical input signal and a response signal according to another exemplary embodiment of a method according to the improved concept.
  • FIG. 4 shows representations of a reference function and a response signal according to a further exemplary embodiment of a method according to the improved concept.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of a test device according to the improved concept and an exemplary equipment.
  • the equipment is shown as an example as a shielded cable with a shield SC and a core SE.
  • the equipment can be any type of electrical equipment with a homogeneous or inhomogeneous structure and components that are electrically insulated from one another.
  • the core SE and screen SC are to be replaced accordingly by the electrically isolated components of the equipment.
  • GIS or GIL for example, this would be one of the insulated conductors and a pressure vessel from GIS / GIL.
  • transformers that would be, for example, a transformer winding and a boiler of the transformer. In principle, decoupling is always possible if there is sufficient capacity to reload and thus capture at least part of the TE.
  • the test device can have a high voltage source HV, for example a high voltage generator, which can be connected to a connection point AS of the equipment, for example the core SE.
  • the test device can also have a coupling capacitor KK and a coupling unit KE, which are connected in series to one another.
  • the coupling capacitor KK can be connected to the connection point AS, for example.
  • the high-voltage source HV and the coupling capacitor KK can be connected at different locations of the equipment, in particular the high-voltage source HV at an embossing point of the equipment, in particular the core SE, and the coupling capacitor KK at the connection point AS.
  • the high-voltage source can also be a component that is anyway required for energy generation or distribution, such as a generator or a mains transformer.
  • the test device has an evaluation unit AE, which is electrically connected to the coupling unit KE, for example.
  • a test voltage provided by the high voltage source HV can be impressed into the equipment at the connection point AS.
  • a signal that is generated, for example, by a partial discharge in an insulation of the equipment can be detected via the coupling capacitor KK and the coupling unit KE and can be output as a measurement signal to the evaluation unit AE.
  • the evaluation unit AE can, for example, digitize the measurement signal and thereby generate a discrete measurement signal.
  • An exemplary discrete measurement signal is shown in FIG. 3a.
  • the evaluation unit AE can then use the measurement signal, in particular the discrete measurement signal, to determine transmission parameters which characterize a signal transmission from a location of the partial discharge in the equipment to the connection point AE and to determine one or more parameters of the partial discharge as a function of the transmission parameters.
  • the transmission parameters can be the predictors a, a virtual filter defined by the recursion equation (1).
  • the evaluation unit AE can therefore transfer parameters by minimizing the total quadratic error qE according to the equation (2) determine.
  • the transmission parameters can be understood as parameters of a transmission function, which links a theoretical input signal through the partial discharge with the discrete measurement signal.
  • the transmission parameters can correspond to pole positions of the transmission function in the complex z-space.
  • FIG. 2a shows a result of an exemplary determination of the transmission parameters.
  • Each cross represents a pole of the associated transfer function.
  • FIG. 2b shows an amplitude (solid line) and a phase angle (dashed line) of the transfer function from FIG. 2a in the frequency domain.
  • the transfer function can be transformed from the z space to the frequency space by inverse z transformation and Fourier transformation.
  • a characterization of the source of the error or sources of error which caused the partial discharge or several partial discharges can already be made.
  • a fingerprint of the error sources can be generated to a certain extent using the transmission parameters and this can be compared, for example, with known characteristic error images.
  • the number of error sources and their relative contribution to the total partial discharge can be determined in this way.
  • Figure 3b shows a theoretical, in particular digitally generated input signal (solid line). Since a partial discharge pulse has a very fast rise time, for example in the range of a few nanoseconds or one nanosecond, the theoretical input signal can correspond, for example, to a digital pulse of minimal width. For example, an area of the theoretical input signal is 1.
  • Figure 3b also shows a response signal (dashed line), which corresponds to the mapping of the theoretical input signal using the transfer function.
  • FIG. 3c shows a reduced section from FIG. 3b.
  • the response signal is similar to the discrete measurement signal from FIG. 3a, but is almost noise-free.
  • the evaluation unit AE can filter and integrate the response signal, for example, in a specific range, for example in IEC 60270: 2000, for example in the range 100-400 kHz.
  • the result of the integration is a measure of the apparent charge of the partial discharge at the location of the TE.
  • the digital input signal has area 1 and the integration of the filtered response signal gives, for example, 0.55. If you compare this value with a reference value, which can be determined, for example, by feeding a defined charge with a TE calibrator, a value for the apparent charge can be determined.
  • an oscillating circuit can be excited from the fault location to the connection point AS.
  • the oscillation can generally, for example, by the differential equation
  • LC-U + RC-U + U 0, (3).
  • U is an electrical voltage
  • R is a resistance
  • L is an inductance
  • C is a capacitance in the resonant circuit.
  • a differential equation for a corresponding electrical current has the same form and can be used analogously.
  • Uo and f are parameters dependent on the initial conditions of the vibration. Appropriate solutions of equation (3) are known for the creep case and the aperiodic limit case.
  • the capacitance C or the inductance L can in particular be determined from an adaptation or a fit of the reference function to the response signal.
  • Figure 4 shows an example of the response signal (dashed) and the reference function (solid line). For a clearer representation, the two curves are shown shifted in time to each other.
  • the geometry of the item of equipment for example length, cross section of the cable, cross section of the core and, if appropriate, the insulating materials used, can be used to distance the fault location from the connection point AS be determined. The fault location can thus be determined.
  • a qualitative characterization of the error source or a plurality of error sources can take place based on inductance L and / or capacitance C. For example, relative distances between fault locations of different fault sources and connection point AS can be determined or limited.
  • a method or a test device enables a more precise TE analysis of electrical equipment.
  • the transferred cargo on Fault location can be determined for all types of electrical equipment, in particular for cables, which allows a considerable improvement in the condition assessment.
  • a method based on the improved concept only a single excitation is required, for example a TE pulse at the fault location. This creates a resonant circuit made up of inductive, capacitive and resistive elements of the equipment and the measuring circuit.
  • fault location in particular in the case of cables, can therefore also be determined without a signal reflection taking place at the fault location. Faults can therefore be detected even at low partial discharge levels, i.e. low converted charges, and thus particularly early.
  • the improved concept also allows different partial discharge sources to be separated on the basis of the transmission parameters determined (“fingerprint”).
  • the improved concept uses the knowledge that the equipment can be viewed as a filter, such as a low pass.
  • a method for LPC can therefore be used to determine the transmission parameters.
  • the accuracy of the transmission parameters depends in particular on the order of the approximation involved and on the data available, for example on a sampling rate or a signal-to-noise ratio of the discrete measurement signal.
  • a method according to the improved concept can also be used to assess the condition of components of the electrical energy transmission, for example in the sense of permanent or continuous monitoring during normal operation of the components (monitoring).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Locating Faults (AREA)

Abstract

Conformément à un procédé d'analyse d'état d'un matériel électrique, une tension d'essai est appliquée au matériel. Puis un signal de mesure est détecté au niveau d'un point de raccordement (AS) du matériel électrique. En fonction du signal de mesure, sont déterminés des paramètres de transmission qui caractérisent une transmission de signal d'un lieu de décharge partielle à l'intérieur du matériel électrique jusqu'au point de raccordement (AS). Au moins une caractéristique de la décharge partielle est déterminée en fonction des paramètres de transmission.
PCT/EP2019/079037 2018-10-26 2019-10-24 Analyse d'état d'un matériel électrique WO2020084058A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR1020217016062A KR20210081414A (ko) 2018-10-26 2019-10-24 전기적 작동 리소스의 상태 분석
CN201980068768.3A CN112912741A (zh) 2018-10-26 2019-10-24 电气的运行器件的状态分析
JP2021522393A JP2022505739A (ja) 2018-10-26 2019-10-24 電気的な動作手段の状態解析
EP19797202.9A EP3870983B1 (fr) 2018-10-26 2019-10-24 Analyse d'état d'un matériel électrique
US17/287,118 US20210356507A1 (en) 2018-10-26 2019-10-24 State analysis of an electrical operating resource
CA3112370A CA3112370A1 (fr) 2018-10-26 2019-10-24 Analyse d'etat d'un materiel electrique
BR112021006275A BR112021006275A2 (pt) 2018-10-26 2019-10-24 método para analisar o estado de um recurso de operação elétrico e aparelho de teste para analisar o estado de tal recurso
ZA2021/01650A ZA202101650B (en) 2018-10-26 2021-03-11 State analysis of an electrical operating resource

Applications Claiming Priority (2)

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DE102018126743.6A DE102018126743B3 (de) 2018-10-26 2018-10-26 Zustandsanalyse eines elektrischen Betriebsmittels
DE102018126743.6 2018-10-26

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EP (1) EP3870983B1 (fr)
JP (1) JP2022505739A (fr)
KR (1) KR20210081414A (fr)
CN (1) CN112912741A (fr)
BR (1) BR112021006275A2 (fr)
CA (1) CA3112370A1 (fr)
DE (1) DE102018126743B3 (fr)
WO (1) WO2020084058A1 (fr)
ZA (1) ZA202101650B (fr)

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Publication number Priority date Publication date Assignee Title
DE102020108382B4 (de) * 2020-03-26 2021-12-09 Maschinenfabrik Reinhausen Gmbh System für eine Kabelstrecke, Übertragungssystem zum Übertragen von elektrischer Energie und Verfahren zum Betrieb des Systems
CN112098781A (zh) * 2020-07-23 2020-12-18 国网天津市电力公司 基于MATLAB/Simulink技术的高压电缆局放信号传输模型建立方法
DE102020122792B4 (de) 2020-09-01 2022-11-03 Maschinenfabrik Reinhausen Gmbh Vorrichtung, System und Verfahren zur Bestimmung von Fehlersignalfenstern in einem Messsignal

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